WO2003020486A1 - Procede de retraitement de produits en matiere plastique ignifuge - Google Patents

Procede de retraitement de produits en matiere plastique ignifuge Download PDF

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Publication number
WO2003020486A1
WO2003020486A1 PCT/JP2002/008891 JP0208891W WO03020486A1 WO 2003020486 A1 WO2003020486 A1 WO 2003020486A1 JP 0208891 W JP0208891 W JP 0208891W WO 03020486 A1 WO03020486 A1 WO 03020486A1
Authority
WO
WIPO (PCT)
Prior art keywords
flame
retardant plastic
retardant
recycled
fire
Prior art date
Application number
PCT/JP2002/008891
Other languages
English (en)
Japanese (ja)
Inventor
Toshiaki Miyanaga
Katsuhiro Yamada
Takuji Motegi
Original Assignee
Nippon Steel Chemical Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Chemical Co., Ltd. filed Critical Nippon Steel Chemical Co., Ltd.
Priority to JP2003524779A priority Critical patent/JPWO2003020486A1/ja
Publication of WO2003020486A1 publication Critical patent/WO2003020486A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B29B17/0404—Disintegrating plastics, e.g. by milling to powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B29B2017/0424—Specific disintegrating techniques; devices therefor
    • B29B2017/0468—Crushing, i.e. disintegrating into small particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
    • B29K2105/0026—Flame proofing or flame retarding agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3055—Cars
    • B29L2031/3061—Number plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the present invention relates to a method for reclaiming a flame-retardant plastic used for discarded home electric appliances and information devices, and more particularly to material recycling of a flame-retardant plastic molded product.
  • the surface layer of a molded product such as a cabinet is not only stained with hand marks or dust, but also has a sticker or the like, is sometimes painted, or is printed such as silk printing. Then, even if you try to reuse used molded products, they become foreign substances and do not exhibit sufficient physical properties. Therefore, as a method of treating used flame-retardant plastic molded products, incineration is used. Processing, thermal decomposition, oiling, and landfilling were the main factors, but flame-retardant plastics often contain halogenated flame retardants as flame retardants, and incineration and oiling are also environmentally friendly. There's a problem. Therefore, Japanese Patent Application Laid-Open No.
  • 12-290424 proposes a method in which a flame-retardant plastic containing a flame retardant is previously brought into contact with water or alcohol to remove the flame retardant, and this is used as a recycled resin.
  • a flame-retardant plastic containing a flame retardant is previously brought into contact with water or alcohol to remove the flame retardant, and this is used as a recycled resin.
  • Japanese Patent Application Laid-Open No. 7-285128 in order to regenerate a plastic molded article with a coating film, a crushing process is combined with a coating film removal process by mechanical, chemical or physical means, and is extruded and regenerated.
  • a method of using a resin is proposed.
  • An object of the present invention is to make a used flame-retardant plastic molded product recovered and sorted out from discarded home electric appliances and information devices into recycled flame-retardant plastic.
  • the flame-retardant plastic molded product that is recycled in the present invention (it may be referred to as a flame-retardant molded product) is a fire-retardant molded product that is obtained by manually disassembling or mechanically disassembling household electric appliance waste and information equipment waste. It is.
  • a flame-retardant molded article include a casing made of flame-retardant plastic, such as a television cabinet, a personal computer body, a display casing, a printer casing, a copying machine casing, and the like. A part of the body, for example, a member such as a TV back cover is included.
  • Plastic molded products removed from household electrical appliances waste and information equipment waste are divided into flame-retardant plastics and non-flame-retardant plastics, and furthermore, flame-retardant plastics are classified according to the type of plastic, flame retardant grade (V-0 , V-2, etc.).
  • the resin variety can be distinguished by the symbol engraved on the plastic molded product, and the selection is easy.
  • information provided by the manufacturer or information that has been handled in the past may be used.
  • plastic molded products that do not have such a resin type can be obtained by the pyrolysis-spectroscopic analysis method described in JP-A-2000-292350, the specific gravity difference sorting, the IR reflection spectroscopy described in the section of the prior art, and the like. And the presence, type, etc. of the flame retardant can be determined. In particular, even when the presence or absence of a halogen-based flame retardant is unknown, when the presence or absence is determined and the resin member is selected from a resin member containing a haptic-based flame retardant and a resin member not containing the halogen-containing flame retardant, X-ray fluorescence analysis is preferable.
  • the flame-retardant molded products that have been selected may be attached with stickers, painted, or printed such as silk-screened. Electronic components, wiring, transformers, heaters, etc. are virtually completely removed.
  • the flame-retardant molded product is crushed.
  • the size of the crushed material is preferably set to an average diameter of 20 mm or less so that the surface layer in the next step is not easily removed. More preferably, the average diameter is from 1 to 15 rnm, even more preferably from 3 to 1 Omm.
  • the average diameter means a plane average diameter when the flame-retardant molded product is a plate-like body formed from a molded product such as a cabinet.
  • a commercially available plastic crusher may be used for this crushing treatment.
  • the powder may be separated.
  • the method of shaving off the surface layer is preferably a dry cleaning treatment, that is, the principle of crushing the crushed materials vigorously and abrading and rubbing the surface layer of the crushed material is preferably applied.
  • pulverized material is sent to a wear chamber with high-pressure gas, or pulverized material is sent to a wear chamber that rotates at high speed without using high-pressure gas. Dry cleaning treatment for efficiently and thinly peeling off the surface layer portion may be mentioned.
  • the device described in the above-mentioned Patent No. 25553807, etc. crushes a crushed resin molded product having a resin coating film formed on the surface by applying a compressive impact force based on microvibration.
  • This is a device provided with means for peeling off the resin coating film and separating the peeled coating film.
  • the apparatus described in the above-mentioned Patent No. 32797332 is used to finely pulverize a crushed resin molded product having a varnish coating on its surface, and at the same time, generate an elongational force and a shearing force on the particles to be ground.
  • the surface layer of the crushed material may be scraped off until substantially no foreign matter or degraded layer is present, but it is 3 to 30% by weight of the crushed material before the treatment, preferably 5 to 5%. It is good to remove 25% by weight, more preferably 7 to 20% by weight. If the content is less than 3% by weight, foreign matter and a deteriorated layer may remain. If the content is more than 30% by weight, waste is increased and material recycling efficiency is reduced.
  • the shaving amount is preferably changed depending on the thickness of the crushed material.
  • the average thickness is 2 mm or more, the amount is preferably 3 to 15% by weight, and when the average thickness is less than 2 mm, 15 to 30% by weight is preferred.
  • the average thickness to be scraped is 0.1 to 1.0 mm, preferably 0.2 to 0.6 mm.
  • the shaving rate of the surface layer is determined by the weight A of the crushed material subjected to the surface grinding treatment, and the amount of the powder passing through the 20 mesh when the surface grinding treatment is performed and sieved into 20 meshes.
  • B is represented, it is represented by B / AX100, and this value is preferably 3 to 30% by weight.
  • the crushed material to be supplied does not include powder that passes through 20 mesh. If powder is included, add 1
  • the average thickness to be scraped is expressed as C--D when the average thickness C of the crushed material subjected to the surface grinding treatment and the average thickness D of the crushed material that does not pass through the 20 mesh after the surface grinding treatment are expressed as follows: This value is preferably between 0.1 and 1.0 mm.
  • the surface foreign matter may be covered with dust, dust, etc., painted, taped or sealed, or paper adhered as foreign matter on the surface. Even if it is printed, printed, or has adhesives or the like, there is no problem at all, and it is possible to obtain the most suitable recycled flame-retardant plastic by shaving off the surface.
  • a layer such as a coating film and a coating is removed, and a part of a non-deteriorated layer such as a fracture surface layer generated by the crushing process becomes powder.
  • the surface grinding conditions are selected so that the non-deteriorated layer does not occupy most of the powder generated by the surface grinding.
  • the crushed flame-retardant plastic that has been surface-ground in this way may have powder generated by surface grinding or dust (dust) adhering due to static electricity or the like.
  • a wind-cleaning treatment is used to blow off the fine powders using a wind-cleaning machine, or a wet-cleaning treatment is used to remove the fine powders using a cleaning liquid such as water that does not dissolve the treated plastic.
  • a more preferable recycled flame-retardant plastic can be obtained.
  • the deterioration in quality due to the surface deterioration layer is somewhat absorbed by this kneading treatment. Therefore, it is possible to further relax the surface grinding conditions in the preceding stage in consideration of the absorption of quality deterioration due to the use of the recycled pellet.
  • the main purpose of the surface grinding in the first stage is to remove foreign substances
  • Such recycled flame retardant plus Ticks exhibit the same level of flame retardancy as unused flame-retardant plastics, but have slightly worse mechanical properties than unused flame-retardant plastics. Therefore, in applications where the required level of mechanical strength is low, this recycled flame-retardant plastic can be reused as it is as a raw material for molding, but the recycled flame-retardant plastic is used for discarded products. When used in the same cabinet or the like, it is advisable to mix the same or different unused flame-retardant plastics (paigne) in order to increase the strength.
  • the preferred blending ratio of the recycled flame-retardant plastic and the unused flame-retardant plastic of the same type or different from the recycled flame-retardant plastic is 5 to 95: 95 to 5, more preferably 1 to 5.
  • the weight ratio is 0 to 50: 90 to 50, more preferably 20 to 40: 80 to 60.
  • Recycled flame-retardant plastics obtained by mixing at 0% by weight or more can exhibit the same level of flame retardancy and mechanical properties as 100% virgin .
  • modified recycled flame-retardant plastics also called modified recycled flame-retardant plastics
  • a combination giving good physical properties is adopted, and such a combination is known.
  • the mixing method is not particularly limited, and examples thereof include a method in which recycled flame-retardant plastic pellets and virgin pellets are mixed at a predetermined ratio, and heated and melted by an extruder or the like to repellet. Can be If only recycled flame-retardant plastic pellets are used, they can be made into pellets as well. No.
  • the base resin of the flame-retardant plastic in the present invention is not particularly limited.
  • polystyrene represented by HIPS and GPPS, acrylonitrile-butadiene-styrene copolymer resin (ABS), polyp Examples include propylene, polyethylene, and polyvinyl chloride, and a polymer alloy or a polymer blend of these may be used.
  • styrene resins, HIPS, GPPS, AS, ABS, and MBS are often used alone or in combination as base resins for flame-retardant plastics used in home appliances. It is suitable for the material recycling of the invention. Particularly, it is suitable for HIPS and GPPS.
  • the flame retardant of the flame-retardant plastic in the present invention is not particularly limited, and a bromo-based flame retardant represented by a decabrom-based flame retardant, and a phosphorus-based flame retardant called Nonde force. Any compound containing a flame retardant called a flame retardant, a chlorine-based flame retardant, or a non-halogen-based flame retardant is applicable, and even a compound containing an inorganic flame retardant such as a hydroxide inorganic substance. Good.
  • the flame retardancy of the recycled flame-retardant plastic (including modified recycled flame-retardant plastic) obtained in the present invention has a flame retardancy specified by V-0 or V- 2 in UL standards. It is good to be.
  • the test was performed using 30 TV sets collected as waste. Remove the back cover of the TV, select only those with a polystyrene (PS) mark and V-O mark engraved on the inside of the back cover, and average out those that are confirmed to be flame-retardant plastic. Diameter 6mm (3 ⁇ 10mm to 95 (wt% or more) to obtain about 2 Okg of crushed flame-retardant plastic. Note that polystyrene (PS) is HIPS, and some of it contains GPPS.
  • the pulverized material was dry-blended well, divided into four pieces of 5 kg each, and the surface layer was scraped off using a dry cleaning machine (one clean separator) manufactured by Fine 'Engineering.
  • This apparatus is provided with a means for scraping the surface layer as described in the above patent and a means for automatically discharging the generated powder.
  • the amount of peeling (grinding rate) of the surface layer was changed by changing the stirring time (applying minute vibration).
  • the grinding rate was calculated from the amount of dust discharged.
  • the dust generally passes through a 20-mesh filter.
  • Example 1 Example 2 Comparative Example 2 Grinding rate iwt% 5Wt% 25Wt% 35Wt ° / o Flame retardant V-2 v-o V-0 v-o
  • the TV back cover (HIPS, V-0) was reprocessed in the same manner as in Example 1, and the obtained regenerated flame-retardant plastic was mixed with the same type of virgin (HIPS, V-0, decabrom-based flame retardant blended). Then, the mixture was mixed at a regenerated material mixing ratio of 0, 5, 10, 30, 50, 75, and 100% by weight, and then repelleted to prepare a recycled flame-retardant plastic.
  • Table 2 shows the results of measurement of tensile yield strength, tensile rupture strength, flexural strength, flexural modulus, MFR, YZ impact strength, and elongation at break.
  • Table 3 shows the results of a sunshine weather meter light resistance test of each commercially available flame retardant PS.
  • test conditions of the sunshine weather were as follows: carbon: super long carbon, four each at the top and bottom, black panel temperature: 63 ⁇ 3 ° C, glass filter material: eight quartz glass, and rain: present.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

La présente invention concerne un procédé de retraitement de produits moulés en matière plastique ignifuge constitués par des rebuts de boîtiers de téléviseurs ou analogues en vue de leur réutilisation en tant que matière plastique ignifuge recyclée. Le procédé de retraitement de matière plastique ignifuge comporte les étapes de pulvérisation des produits moulés en matière plastique ignifuge récupérés à partir de déchets contenant des produits moulés en matière plastique ignifuge, et l'abrasion superficielle des produits pulvérisés obtenus en vue d'enlever entre 3 et 30 % en poids de la couche superficielle. L'abrasion superficielle peut mettre en oeuvre un procédé de nettoyage à sec pour le raclage de la couche superficielle en permettant la collision entre produits pulvérisés ou entre produits pulvérisés et les parois d'un contenant. La matière plastique ignifuge recyclée obtenue par ce procédé peut être utilisée en tant que telle ou en mélange avec de la matière plastique ignifuge intacte semblable ou pas à la matière plastique ignifuge recyclée dans un rapport pondéral de 5/95:95/5, et répond à un grade V-0 ou V-2 de la norme UL.
PCT/JP2002/008891 2001-09-03 2002-09-02 Procede de retraitement de produits en matiere plastique ignifuge WO2003020486A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003524779A JPWO2003020486A1 (ja) 2001-09-03 2002-09-02 難燃性プラスチックの再生処理方法

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Application Number Priority Date Filing Date Title
JP2001266276 2001-09-03
JP2001-266276 2001-09-03

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WO2003020486A1 true WO2003020486A1 (fr) 2003-03-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1405706A1 (fr) * 2002-10-02 2004-04-07 Nippon Steel Chemical Co., Ltd. Méthode de recyclage pour des déchets de matières plastiques

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6829848B1 (ja) * 2019-12-16 2021-02-17 株式会社手工仁久 プラスチック廃棄物を利用した合成樹脂成形品

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4208015A (en) * 1977-10-12 1980-06-17 Kabushiki Kaisha Meiji Gomu Kasei Method of regeneration of plastics material by removing outer deteriorated layer
JPS5736616A (en) * 1980-08-15 1982-02-27 Mitsubishi Chem Ind Ltd Method and apparatus for separating degradated layer of synthetic resin molded product
JPH07214555A (ja) * 1994-01-31 1995-08-15 Tsutsunaka Plast Ind Co Ltd ポリカーボネート成形廃棄物の再利用方法
JP2000001567A (ja) * 1998-06-15 2000-01-07 Nec Corp プラスチック成形品のリサイクル方法
JP2000351881A (ja) * 1999-04-06 2000-12-19 Toray Ind Inc 難燃性樹脂組成物及びその成形品

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4208015A (en) * 1977-10-12 1980-06-17 Kabushiki Kaisha Meiji Gomu Kasei Method of regeneration of plastics material by removing outer deteriorated layer
JPS5736616A (en) * 1980-08-15 1982-02-27 Mitsubishi Chem Ind Ltd Method and apparatus for separating degradated layer of synthetic resin molded product
JPH07214555A (ja) * 1994-01-31 1995-08-15 Tsutsunaka Plast Ind Co Ltd ポリカーボネート成形廃棄物の再利用方法
JP2000001567A (ja) * 1998-06-15 2000-01-07 Nec Corp プラスチック成形品のリサイクル方法
JP2000351881A (ja) * 1999-04-06 2000-12-19 Toray Ind Inc 難燃性樹脂組成物及びその成形品

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1405706A1 (fr) * 2002-10-02 2004-04-07 Nippon Steel Chemical Co., Ltd. Méthode de recyclage pour des déchets de matières plastiques

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Publication number Publication date
JPWO2003020486A1 (ja) 2004-12-16
CN1549765A (zh) 2004-11-24
CN100453284C (zh) 2009-01-21

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